Hull for flying-boats.



G. H. CURTISS. HULL FORFLYING sous.

r AFPLICKTION FIL ED OCT. I8. 1915. 1,210,374.

Patented Dec. 26, 1916.

w n ww m m NN If KL [6 y AWORNEY GLENN H. GUETISS, 9E BUFFALO, NEW YQRK.

Specification of Letters Batcntt Patented Dec. 26, U316:

Application filed was it, 1915. Serial No. 56,603.

To all whom it may concern:

Be it known that I, GLENN Conriss, a cltizen of the United States, residing at Buffalm in the county of Erie and State of New York, have invented certain new and useful Improvements in Hulls for Flying- Boats, of which the following is a specification.

(My invention relates to boat hulls of that description commonly used in connection with the type of flying machines called flying boats. This type is characterized by the support of the tail controls upon and the passengers in which also carries abeam of itself an air However, as will appear'hereinafter more clearly, my invention detail those embodiments is applicable-to hulls of hydroplanes of other types than fiying boats.

The general object of my invention is to provide improvements in carrying capacity,

strength and eliiciency'of such hulls, as well as to simplify the construction thereof.

Such hulls have hydropla-ning surfaces on their bottoms, and the simplification of construction is especially directed toward the improved planing. action of such hulls through a verysimple addition of lateral fin members which'are used to provide an auxiliary hydroplaning surface. Great strength is secured by a system of bracing, and increased capacity is combined creased planing surface, strength of bracing connection, and novel arrangement of passengers"cockpits with relation to the points of support of the aerial supporting surfaces. In the accompanying drawings I show in of my invention new best known to me. The development of other embodiments having similar basic characteristics is contemplated from time to time.

Of thedrawings, Figure 1 is a side elevation of the boat hull of my invention; Fig. 2 is a. plan view thereof; Fig. 3 isa front elevation thereof; Fig. 4 is a partial transverse sectional view; and Fig.

section of a modification.

The body proper of the hull is designated 10. This is of the general form commonly used by me for several years past, and which is commonly recognized as a type. It is essentially of streamline form having a rather blunt and bulged out head portion which commences to' taper rearwardly in function it acts as a the body of the boat hull act as a 'hydroplaning chine edge thereof is a tending longitudinally modified 5 is a similarto rear on a curve, as'clearly appears in Fig.

1, the inclination being suitably downward at the bow and then continued at a gradually lessening degree of curvature rearwardly until its path is very nearly a straight line. This bottom terminates at 13 in what is commonly called. a step, though terminus of the planing surface only. The bottom 14: of the tail of the boat inclines upwardly from this point, and lies in a'plane that makes a salient angle with the bottom 12 of the forward portion.

surface in con unction with surface 12 The bottom lfl is very flat. e i l Attached to each side of the boat near the wide plank or planing longitudinally of the boat against the rabbet strip '15, and formsa projecting fin ofrelatively thin materialand substantially uni rabbet strip 15. A board- 16, is secured .50

Thus tlie'surface 14 does not formthickness. This planing board may in cases of great eral longitudinally extended planks, but in any case its surface bottom is in lateral extension of the hydroplaning bottom of the boat, and bent in. its length to conform to the longitudinal curve of such bottom. Ex-

of' its top at a point removed from the outer edge is a stringer 17 Secured to the side of the boat at'a point removed from the chine and the rabbet strip 15, is a second rabbet strip 18. Between the rabbet strip 18 and the stringer 17 are arranged a plurality of laterally extending strut braces 19 which strongly brace the width be constructed of sevplaning board from the side of the boat. A

construction of this planing board is shown in Fig. 5, wherein the bottom transverse ribs 20 of the body are extended laterally for the width of the'planing board desired. The extended ends are then covered on both sides with a thin laminated surface stock 21 or the equivalent, and the spaces between the members 21 are closed by the filler strips 2-2. Thus the rabbit strip 15 is done away with and the danger of warping or springingreduced to a minimum, and the strength enhanced. The system of lateral bracing l7, l8 and 19 is much the same.

Abeam of the hull l0 and arranged for a center of pressure and center of gravity approximately vertically above the step 13, is a built-in wing supporting structure 23. This is made of wood and hasthe form of short stub wing sections. This'structure is braced downwardly to the side of the boat by braces 24., Between braces 19. and braces 2i, the side of the boat and the wing sup-- The usual post bow braces 28, found so important in bracing the wing structure and elevated motor from the bow of the boat, enter the hull at similar points between the two cockpits as indicated. These braces extend in a forwardly divergent manner from the engine bed beams supported thereby above the'boa't hull and are suitably anchored directly within the hull. Continuing from the anchored extremities of these braces are the forwardly convergent post braces 29 which commonly intersect with the bottom 12- immediately in rear of what willprove the impact surface of the boat how when a landing is made. The engine bed, accordingly, i s braced securely to that bow portion where the impact shock is to be expected, but is so braced by way of the intermediate hull connection as to result in an advantageous tying of the entire structure for unit distribution of the landing shocks.

What I claim as my invention is:

1. In a hull for flying boats, a V-shaped hydroplaning bottom, and a forwardly located longitudinally elongated fin member of substantially uniform thickness in lateral extension. of the V-sides of said bottom. 22-. A boat hull for flying boat-s having a hydroplaning bottom of substantially the same width as the beam of the boat, and relatively thin fin members in lateral exten sion of the hydroplaning bottom, each fin tapering forwardly in substantially streamline form.

A hullfor flying boats having a forwardly disposed V-shaped hydroplaning bottom, and iin members co-extensive with said bottom in the form of longitudinally laid planks of substantially no displacement. the width of which planks are in lat-- eral extension of the V-sides of said bottom.

in A hull for flying boats having a hydro planing bottom, longitudinally elongated relatively thin fin members in lateral extension ofthe bottom of the boat, and exposed struts bracing the fins to the side of the boa abovethe chines thereof.

5. A hull for flying boats having a hydro- I planing bottom, a fin member in lateral extension thereof, a strmger laid longitudinally of the fin at a point removed from the.

braces between said rabbet strip and said fin at points removed from the chine.

A hull tor flying boats having a hydroplanmg bottom, a rabbet strip secured to the s1de of the boat adjacent to the chine but removed'slightly from the bottom surface, a plank laid beneath said strip flush with the bottom of the boat and having its surface in lateral extension thereof, together with struts bracing said plank from the side of the boat.

8. A bull for flying boats including a supporting surface of a construction designed to form conjointly with the hull top a dock extending laterally beyond the sides of the hull and a cock pit located immediately ahead of said supporting surface to permit of ingress and egress respectively to and from the hull interior via the cockpit to said deck.

9. A flying boat hull having a built in wing supporting structure and av hydroplaning bottom, fin members in lateral extension of said bottom, and strut braces between the side of the boat and said built in supporting structure and said fins respectively.

10. A hull for flying boats having a hydroplaning bottom longitudinally curved front to rear, fin members comprising planks arranged with their under surfaces in lateral extension of the hydroplaning bottom and bent lengthwise to conform to the longitudinal curvature of said bottom.

11. A hull for flying boats having a hydroplaning bottom, laterally extending hydroplaning fin members continuing said bottom, and forwardly divergent post braces anchored to said hu l and inclined in direction toward the impact portions of said bottom fin members.

12. A bull for flying boats having a hydroplaning bottom, laterally extending hydroplaning fins continuing said bottom, and forwardly convergent post braces anchored to said hull and connecting the impact portions of said bottom and fins thereto.

13. A bull for flying boats having a hydroplaning bottom. laterally extending planing surfaces continuing said bottom, post braces diverging from the impact pornear AVAILABLE COP tions of said bottom and surfaces foranchora in said hull, a driving motor for the boat, and post braces (Ion-verging from the pointsof hull anchorage of first said braces for support of said motor.

5 14. A bull for flying boats having a hyna said bottom, wings built into said hull and extending there across, and 1ndividual means bracing said bottom, said I sides of said hull. v

'15. A bull for flying boats including a built-in wing structure having its top-side merging uninterruptedly into the hull deck to form therewith a relatively large deck fins and said extended wings directly to the I area.

16. A hull for flying boats, including a supporting surface of a construction de-- signed to form conjointly vvith the hull top a deck extending laterally beyond the side's of the hull, and a means bracing the extended deck area from beneath.

-17. A hull for flying boats having a hydroplaning bottom of V- form throughout, and relatively elongated transversely thin fin-boards of substantially no displacement r sot-tom, laterally extendmg'fins in lateral extension of the Y sides of said bottom.

1s. A hull in flying boats having a hyi 'droplaning bottom of V form in transverse section, and relatively narrow elongated fin me bers of substantially no displacement 'andxofi uniform thickness in lateral extension of the V sides of said bottom 19.\A hull for flying boats having a hydroplaning bottom longitudinally curved from front to rear, and fin members comprising planks arranged with their under surfaces inlateral extension of said hydroplaning botton, each plank having a 'longitudinal curvr.- Ire substantially analogous to the curvature of said bottom.

20. A hull for flying boats having a hydroplanin bottom, and fin members comprising p anks bent longitudinally. to conform to the chine curvature of the hull.

21. A flying boat hull having n hydro- 

